Edwaed b



(No Model.)

- E. B. NIMMO.

STYLOGRAPHIG PEN.

Patente Sept. l, 1883.

forms the ink-reservoir.

. in stylographic pen iviinn STATESA EDVARD B. NIMMO, OF

STYLOGRA SPECIFICATION forming part'of Letters P BROOKLYN, NEX/V YORK.

PHlc PEN. f

atentY No. 284,569, dated September 4, 1883.

Application filed october 9, rss2. :No mmieifi To @ZZ wiz/om, t mayconcern/f j Be it known that I, EDWARD B. N IMMO, of Brooklyn, Kingscounty, New York, have invented certain new and useful Improvements inStylographic Pens, of which the following is a specification.

My improvement aims to furnish a stylographic or fountain pen of simpleand inexpensive construction with an effective action, more particularlyin insuring an even and regular flow of the ink when writing, yetreducing the bleeding77 action to a minimum.`

To` these ends my invention embodies sev eral novel features,whicl1 liechiefly in the construction of the ink-reservoir and its outlets, and inthe vibrating needle-holder or ink-con ductor which operates inrelation'with the res-v ervoir, whose obj ects are to insure theretention of the ink when the pen is quiescent, yet render its llowcertain and regular when the pen is in action, as hereinafter fully setforth.

In the annexed drawings, Figure l presents'V an external elevation of myimproved pen. Fig. 2 is a sectional elevation thereof, showing` itsinterior. Fig. 3 is a fragmentary sectional elevation of the lower part,taken at right an. gles to Fig. 2. Fig. et is a view of the needle andits holder removed. Fig. 5 represents a modification of the outlet endof the ink-reservoir. Fig. 6 represents a plan of the outletvalve of theink-reservoir.

In the drawings, a indicates the case or handle of the pen,which is, asusual, a tube, and In the upper end of this tube is screwed the hollowplug b, which carries an inwardly-op eningvalve, which forms theair-vent valve, and is held -lightly to its seat by a delicate spring,but will yield slightly to allow a slow infiltration ofair when theventcap c is screwed up, as will'be understood. This vent-valve, 85e.,is of ordinary construction,which is well shown in the drawings, andtherefore needs no special ldescription here. The lower end of thereservoir tube a lis threaded internally to receive the threaded neck onthe point-section (l, which screws tightly therein, as usual. In thepointed end of the section el is fixed the usual capillary tube, formingthe writing-tip of the pen, in which the needle or Style e worksas iscommon Now, nea-r the bore or outlet end of the reservoir, and justabove the socket in which the point-section is screwed, a groove, f, isformed around the bore of the reservoir, in which a disk, h., of purevulcanized elastic rubber or other suitable iieXible or elasticmaterial, is socketed, as fully shown Iin Figs.' 2 and 3. This disk isshown detached in plan in Fig. 6, and is slit or perforated with one ormore slits or cuts,preferably at right angles to each other, in crossshape, as shown, which slits are also indicated in Figs. 2 and 3. Thisdisk thus covers the mouth or outlet of the reservoir, land when at restthe slit or cut sections close together, so as to positively retain theink and prevent its outflow'from the reservoir. If, however, the disk beagitated or moved up and down slightly at the middle, the slits or Y cutsections will be slightly opened and closed and so articulated as toproduce a gentle, regular, and positive outfeed of the ink. Thisink-feeding movement of the disk is effected directly by the natural andusual vibration of the needle e in the act of writing, for the upper andinner end of the needle is connected with the needle-holder y, which isinclosed in the point-section d, and reaches to the slit disk 7L andbears upon or cont-acts therewith, as fully shown in Figs. 2 and 3. Asusual, the point of the needle@ protrudes slightly from thewriting-point of the pen when at rest, as seen in Fig. 3, and in thisposition of the needle the needle-holder g will seat at its lower end onthe tapering end of the bore or cavity in the point-section whichvincloses it, which thus forms astop to prevent the further projectionof the needle, and the further down motion of its holder. The holder,however, is of such a length that when in this position its upper endwill just contactwith the disk h, when said disk is in its quiescent andflat position, as seen in Fig. 3. It is therefore obvious that when theneedle is forced inward hy the `pressure of writing, the needle-holderwill be forced against the disk h., so as to distend or bulge the diskslightly upward or inward in the reservoir, as shown 'in Fig. 2, whilewhen the elastic reaction of the disk will move the needle-holder backto its stop and project the point of the needle from the tip of the pen,as seen in Fig. 3. Hence the vibrations of the pressure on theneedle-point is relaxed the IOO needle agitate the disk, and viceversa,thus producing a gentle and positive outfeed of the ink, proportioned tothe movements of the needle, while at the same time the elastic diskserves as a spring to keep the needle proj eeted assisted by the weightof the holder g, thus dispensing with the necessity for a specialspring, as heretofore used, and thereby rendering the construction verysimple and efficient. rIhe needle-holder g may therefore be termed theagitator/7 as it agitates the disk and induces the outfeed of the ink,and it may also be termed the ink-conductor, as it con- .ducts the inklby capillary attraction direct from the disk to the needle, or to thecapillary tube r, in which the needle Works. The agitator is, hence,made of two thin overlying plates, g g, loosely riveted to the needle atthe lower end, thus leaving` a narrow capillary space between theplates, through which' the ink is evenly conducted from the disk totheneedle, as best shown in Fig. 2.

The needle e is preferable made of a iinev stiiil wire, of any suitablemetal, bent withair eye at its upper end, and held between the lowerends of the agitator-plates g gv by a rivet, i. The plates g are thusriveted together andI forms a pivot on which the plates `may be swungapart or diverged, as seen in Fig. 4, which will thus allow the platesto be easily cleaned of any incrustations of ink or other somewhat freeor loose, so that in the vibration of the needle and agitator the platesare permitted a slight longitudinal shearing movement on each other,which conduces toa perf fect feed of the ink down the capillary channelbetween them, and prevents the ink from becoming clogged therein, aswillv be readily appreciated.

voir opening directly over the disk h, I prefer to provide the reservoirwith a damming tube or partition, k, rising from the bottom of thereservoir up withiny the same to about the middle thereof, as shown inFig. 2, the interior or bore of the tube forming the outletchannel tothe disk l1', while the space around the tube forms a pocket in which aquantity of ink will always be dammedf or imprisoned. This feature ofconstruction I find to greatly reduce the tendency to. bleed, whichexists to a greater or less eXtentin allpens ofthis class, caused by theexpansion ofthe containedair,

commencing to write. The` contracted'passage of the tube 7c and thelarger capillary surfaces which it presents to the ink seemtoappreciably retard its outiiow, so that bleeding is greatly resistedand reduced. By this means, also, but a small quantity of the ink in thereservoir rests on the diaphragm` h, particularly when the ink has beenused down to thetubek, and

after this point the ink held in the pocket i around the tube may bereadily thrown. overinto the outlet-channel by giving the penv anoccasional shake during writing, thus keeping upa supply of ink to thedisk h Without having the entire quantity sustained on the disk.

By referring to Figs. 2, 3, and 4 it will be noted that the agitator g gis formed of two thin iiat blades, preferably of hard rubber, of aboutthe same width as the diameter of the round cavity or bore in thepoint-section which l incloses them, so that the agitator is a niceworking fit in the position of a diametrical plane in the cavity, butdoes not entirely fill the cavity, leaving a freespace on each sideofthe agitator, as seenin Fig. 2. This feature also reduces bleeding,as-the free space on each side of the agitator allows the small quantityof ink which may bleed from the disk h` torise in this space, and thusprevents -it from immediately ruiming of or bleeding from the. tip.before it could be used inthe act J of' writing, as will be readilyunderstood.

In Fig. 2 I have shown the tube k and sock- I et for thedisk n formedsolid or integral with -the case or reservoir-tube a, but these parts Qmay be made. separate from the tube a, 'as indicatedfin. Eig. 5, andthen tightly inserted in' 4the.reservoir-tube, as will be understood.

to the needle at one end only, which thus rIhie entire construction ofthe pen, as may Anow bey seen, is simple and inexpensive, and its actiondirect, positive, and reliable, and .the invention. forms, it isbelieved, a material improvement in pens of this class.

matter. The riveted joint, furthermore, is

What I claim is- 1. A fountain. or stylographic pen construct- Q ed witha flexible and slit or perforated disk `or diaphragm covering the outletof its ink- Vreservoir, with an agitator arranged to vibrate against thesaid slit disk by the vibratory movement of the needle or writingmovement of the pen, substantially as and for the purpose herein setforth. Instead of having the base of the ink-reser- 2. Ina stylographicpen, an elastic slit disk coveringy the outlet of the ink-reservoir, `incombination with an agitator connected with the vibrating needle,bearing at one end against -the said elastic disk, and resting at theopposite end o n a seat or stop in the pen point or' case, whereby theinward movement of the needle and connected agitator distends. or 5stretches said` disk, while the elastic reaction of athe disk throws outthe agitator and its at- :tached. needle, thereby maintaining the vibratory motion ofthe needle and inducing the .f outfeedn of the ink at thesame time, substan- Vtially as herein shown and described.

and ink, due to the heat ofthehand whenrst 3. In. ay stylographic pen,an agitator andinkconveyer .connected at one end with the needley andbearing at the opposite end on the outlet of the ink-reservoir, andformed in two overlying platesA or sections, forming a capililaryink-channel between them fromthe outi let of the reservoir to theneedle, or tothe capillary tube in which the needle works, substantiallyas herein set forth.

4. The combination, in a stylographic pen,

Vwith the vibrating needle, theink-reservoir,

and a suitable vent thereto, of an elasticV slit IOO IIO

disk or partition covering the internal outlet of the ink-reservoir, anagitator .connected with the vibrating needle and bearing on said disk,and formed in two overlying plates, with a capillary ink-channel betweentheni, substantially as `herein shown and described.

5. The needle-holder and ink-conductor g g, formed of two overlyingplates or blades pivoted to each other at one end at their connectionwith the needle, and capable of being opened or diverged apart or closedtogether, substantially as and for the lpurpose set forth.

G. In a stylographie pen, an ink-reservoir formed with an intermediatedainniing tube or partition rising from the inlroutlet at the base ofthe reservoir up within the saine to or near the middle thereof, forminga dainnied ink space or pocket around or on one side of said partitionor tube, from which the ink can be shaken into the outlet-channel asdesired, substantially as and for the purpose set forth.

7. A stylographic pen constructed to. enibody the following elements: anink-reservoir fornied with a suitable air-vent at one end and aninternal outlet at the other end, an

elastie slit disk covering said outlet, an agitaf tor bearing below saiddisk and connected with the needle in the point-section of the oase, anda bore or cavity around said agitator in the point-section, of largervolume than the agitator, providing a free space about the same,substantially as and for the purpose set forth.

8. In a stylographic pen, the combination, with the ink-reservoir,`formed with a socketgroove around lits base or outlet, of an elasticslit disk, hf, secured therein, and a vibrating needle operating inrelation therewith in the point-section of the pen, substantially asandfor the purpose set forth. y

9. In astylographic pen, an ink agitator and conveyer connected with theneedle, formed of two overlying plates, providing a capillaryink-channel between them, and freely jointed to permit of a longitudinalshearing niove- 45 nient of the plates upon each other under thevibrationsof the needle, substantially as herein set forth.

EDV. B. NIMMO. Vitnesses:

CHAs. M. HIGGrNs, JN0. E. Gavin.

